3Battese G.E,Rao D.S.P,O' Donnell C.J. A Metafrontier Production Function for Estimation of Technical Efficiencies and Technology Gaps for Firms Operating Under Different Technologies[J].JOURNAL OF PRODUCTIVITY ANALYSIS,2004.91-103.
4Hu,J.L,Wang,S.C. Total-factor Energy Efficiency of Regions in China[J].ENERGY POLICY,2006,(34):3206-3217.
5Hashimoto A,Haneda S. Measuring the Change in R&D Efficiency of the Japanese Pharmaceutical Industry[J].Research Policy,2008,(10):1829-1836.
6Wang E.C,Huang W.C. Relative Efficiency of R&D Activities:A Cross-country Study Accounting for Environmental Factors in the DEA Approach[J].Research Policy,2007,(36):260-273.
7Wang E.C. R&D Efficiency and Economic Performance:A Cross-country Analysis Using the Stochastic Frontier Approach[J].JOURNAL OF POLICY MODELING,2007,(02):345-360.
